State of the art calculations of eTFF's are performed using various approaches: effective Lagrangians  [1]}, [2]}, Dyson-Schwinger formalism  [3]}, [4]}, quark models [5]}, [6]} and dispersion relations [7]}, [8]}, [9]} (for a recent review see also [10]}).
Recently, substantial progress has been made in extracting eTFF's from lattice-QCD calculations, both on the mesonic (pionic) [11]}, [12]} and baryonic sector [13]}, [14]}.
In particular the \(\omega \)  eTFF has triggered a lot of interest due to apparent violation of strict VDM.
The description has been significantly improved by leading order chiral Lagrangian calculations [2]} and dispersive theories [8]}, all of which still failing to account for its strong rise at very large \(q^2\) .
